Joyo monomyth bass guitar preamp

New item, open box. High pitched squeal have been perfectly solved about R-26 bass preamp pedal. Thank you fans for providing product suggestions to help us improve our products. High dynamic 6-band graphic EQ control, precisely enhance tone for bass guitarists in recording sessions, stage performance, etc. Dual channel:TREBLE and GAIN BOOST with an independent overdrive footswitch,as well as VOICE/BLEND/LEVEL/DRIVE multifunctional control knobs. Turning on CAB Sim switch, extremely realistic bass cabinet simulation tone, can feedback 8*10 cabinets sense of shock. Noise reduction tip: turning on Ground Left switch and using JOYO 9V DC pedal power supply, both can effectively reduce noise caused by current.